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The Dugong is an endangered species; the largest remaining population is found in Australian waters
Fluid mosaic model
Lymphatic vessels (green) pick up excess tissue fluid, purify it in lymph nodes, and return it to th
Rock layers (strata) usually look like layers in a cake such as these strata at Olduvai Gorge Tanzan
A developing fetus is cushioned in a sac of watery amniotic fluid
Eye layers